P0422: Main Catalyst Efficiency Below Threshold (Bank 1)
That is what my OBD read this afternoon when I was on my way to church. Right after church, I went to AutoZone and had the code read.
From what I understand, this basically means that the oxygen sensor downstream of the catalytic converter on bank 1 is detecting that the converter is not working as efficiently as it should be (according to specs).
From reading online, I have learned taht these are the things I should be checking for:
- Catalytic converter defficiency
- Engine misfire
- Vacuum leak
- Oil leak into exhaust valve
- Oxygen sensors
Please help me out by telling me how to test for each of these things. I have a Bentley manual, but I have not gone into this problem in detail yet. I'll be out of the country for a couple of weeks, so please reply even if it seems like I no longer care. I will keep you up to date (and will come back and bump this thread a few times while I am gone).
I read somewhere that the simplest solution is to reset the code and see if it comes back. That doesn't make much sense to me. What do you think?